Question

Solve the simultaneous equations. You must show all your working.
3x + 7y = -21
6x + 4y = 3​

Answer 1

Step-by-step explanation:

I am not sure about the ans but pretty sure about the process... you can cross check ...

Answer 2

Answer:

3x+7y=-21________×4

6x+4y=3_________×7

12x+28y=-84

42x+28y=21

- -. -

-30x+0=-105

-30x = -105

X = -105/-30

X= 105/30

X =3.5

therefore

6×(3.5)+4y=3

21+4y=3

4y=3-21

4y= -18

y= -18/4

y= -3